Prime-Factor Prime 题目描述 A positive integer is called a "prime-factor prime" when the number of its prime factors is prime. For example, 12 is a prime-factor prime because the number of prime factors of 12223 is 3, which is prime. On the other…
Prime Factory (Training, Math) 题目描述 Your task is simple: Find the first two primes above 1 million, whose separate digit sums are also prime. As example take 23, which is a prime whose digit sum, 5, is also prime. The solution is the concatination of t…
此题需要使用到质因子分解的算法,可以参考以下链接:
https://blog.csdn.net/qq_42410605/article/details/100150140
题目描述:
Given any positive integer N,you are supposed to find all of prime factors,and write them in the form…